485: Difference between revisions
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==Specifications== | ==Specifications== | ||
[[Category:Specifications needed]]''please add'' | [[Category:Specifications needed]]''please add'' | ||
==Links== | |||
* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/485.html Tek 485 @ amplifier.cd] | |||
==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
File:Tektronix 485 oscilloscope2.jpg | |||
File:Tek 485.jpg | |||
File:Tek 485 front2.jpg | |||
File:Tek 485 front.jpg | |||
File:Tek 485 rear.jpg | |||
File:Tektronix 485 oscilloscope5.jpg | |||
File:Tek 485 tq.jpg | |||
File:USA Tektronix 485 Inside1.jpg | File:USA Tektronix 485 Inside1.jpg | ||
</gallery> | </gallery> | ||
[[Category:400 series scopes]] | [[Category:400 series scopes]] | ||
Revision as of 03:33, 7 April 2015
The Tektronix 485 is a dual-trace, portable analog oscilloscope with a maximum bandwidth of 350 MHz. The impedance of the inputs can be set individually to 50 Ω or 1 MΩ. The scope achieves its maximum bandwidth when the inputs are in 50 Ω mode.
The 485 was introduced in March of 1972. It includes a switching power supply and uses custom integrated circuits for most of the gain blocks. Triggering uses tunnel diodes.
A distinguishing feature – at least in a portable oscilloscope of its period – is the Alternate Horizontal Mode. In this mode, the B timebase is shown in a separate full-width scan, as opposed to the more common Mixed Mode, where the B timebase is shown on the same line as the A timebase, after the delay time. At the same time, the section shown with the B timebase is shown highlighted in the A scan.
The 465, which was introduced after the 485, only received this feature in its "B" incarnation (465B).
Specifications
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